Haemoglobin

How many subunits make up a haemoglobin molecule?

• 1

• 2

• 3

• 4

Which of the following is NOT a function of haemoglobin?

• Buffering pH

• Carriage of carbon dioxide

• Carriage of oxygen

• Dissipation of heat

In haemoglobin, what is the ion at the centre of the haem group?

• Cu²⁺

• Fe²⁺

• Fe³⁺

• Mg²⁺

True or false? Globin chains can vary between species?

• True

• False

The shape of the oxygen dissociation curve of haemoglobin is described as what?

• Hyperbolic

• Parabolic

• Sigmoid

• Wiggly

What does a right shift in the oxygen dissociation curve of haemoglobin indicate?

• Decreased affinity of haemoglobin for oxygen

• Increased affinity of haemoglobin for oxygen

• No change in the affinity of haemoglobin for oxygen

• Reduced haemoglobin levels in the blood

Which of the following would result in a left-shifted dissociation curve?

• Decreased pH

• Decreased temperature

• Increased CO₂ concentration

• Increased temperature

True or false? Fetal haemoglobin has a lower affinity for oxygen than adult haemoglobin.

• True

• False

Where is myoglobin found?

• Blood

• Liver

• Lungs

• Muscles

In what form is most carbon dioxide transported in the blood?

• Bicarbonate ions

• Carbamino-haemoglobin

• Carbonic acid

• Simple solution